Make dart:dom implementation types private so they don't muddle the docs.

client/dom/generated/src/frog/SVGTransform.dart

Index: client/dom/generated/src/frog/SVGTransform.dart
diff --git a/client/dom/generated/src/frog/SVGTransform.dart b/client/dom/generated/src/frog/SVGTransform.dart
index 303dae9de41d9a4feb925054a8ca4ba9ca0fa197..a064fa74341b07048c57f7a4858d6df1e57c6226 100644
--- a/client/dom/generated/src/frog/SVGTransform.dart
+++ b/client/dom/generated/src/frog/SVGTransform.dart
@@ -1,5 +1,5 @@
 
-class SVGTransformJs extends DOMTypeJs implements SVGTransform native "*SVGTransform" {
+class _SVGTransformJs extends _DOMTypeJs implements SVGTransform native "*SVGTransform" {
 
   static final int SVG_TRANSFORM_MATRIX = 1;
 
@@ -17,11 +17,11 @@ class SVGTransformJs extends DOMTypeJs implements SVGTransform native "*SVGTrans
 
   num get angle() native "return this.angle;";
 
-  SVGMatrixJs get matrix() native "return this.matrix;";
+  _SVGMatrixJs get matrix() native "return this.matrix;";
 
   int get type() native "return this.type;";
 
-  void setMatrix(SVGMatrixJs matrix) native;
+  void setMatrix(_SVGMatrixJs matrix) native;
 
   void setRotate(num angle, num cx, num cy) native;